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What is the solubility of O2(g) in water at 25C if the atmospheric pressure is 841 mmHg? The Henry's law constant for oxygen gas at 25C is 1.3 * 10-3 mol/L.atm A 2.7 X 10 -4 M B 9.6 X 10 -3 M 1.4 X 10-3 M 6.2 X10-3 M A 249 mL benzene solution containing 2.89 g of an organic polymer has an osmotic pressure of 7.59 mm Hg at 11C. Calculate the molar mass of the polymer.[R=0.0821 L atm/K mol] A 3.30 X 104 g/mol B 2.71 X 104 g/mol 1.79 X104 g/mol D 2.13 X 104 g/mol